Irwin 1959551 Bench Vises; Jaw Width: 4 in; Jaw Opening Capacity: 4.25 in; Throat Depth: 2.375 in; Minimum Pipe Capacity (Inch): 1/16; Minimum Pipe Capacity (Decimal Inch): 0.0625; Maximum Pipe Capacity (Decimal Inch): 4.2500; Maximum Pipe Capacity (